The researchers wanted to speed up the process of growing guava seedlings by grafting them onto smaller clonal rootstocks. They used a technique called mini-grafting on rootstocks made from herbaceous cuttings. By grafting onto smaller-diameter stems, they were able to produce seedlings faster. They found that grafting onto rootstocks with diameters between 3.7 to 5.5 mm resulted in successful seedling growth suitable for transplanting within 300 days. While seedlings grafted onto larger-diameter rootstocks showed greater vigor, those grafted onto smaller rootstocks still had a good success rate.